ntdll: Perform the offset checks also for a serial device.

[Dmitry Timoshkov]

Francois Gouget <fgouget at free.fr> wrote:

> > > === w7pro64 (32 bit comm) ===
> > > comm.c:863: Test failed: WaitCommEvent failed with a timeout
> > > comm.c:875: recovering after WAIT_TIMEOUT...
> > > comm.c:886: Test failed: WaitCommEvent error 0
> > > comm.c:888: Test failed: WaitCommEvent: expected EV_TXEMPTY, got 0
> > > comm.c:892: WaitCommEvent for EV_TXEMPTY took 1014 ms (timeout 1000)
> > > comm.c:894: Test failed: WaitCommEvent used 1014 ms for waiting
> > > comm.c:1561: test_AbortWaitCts timeout 500 handle 000000F8
> > > comm.c:1528:  Changing CommMask on the fly for handle 000000F8 after timeout 500
> > 
> > This VM is broken,
> 
> How so? That is: what should I do to fix it?

Investigate, find the source of failures and fix it? Note, that all
other VMs pass this test just fine, moreover, this same w7pro64 VM
doesn't always fail.

-- 
Dmitry.